import java.util.*;
public class E4 {
    public static void main (String args[]) {
        Scanner reader = new Scanner(System.in);
        double sum = 0;
        int m = 0;
        while (reader.hasNextDouble()) {
            double x = reader.nextDouble();
            assert (x<100):"非法的成绩数据";
            m = m+1;
            sum = sum + x;
        }
        System.out.printf("%d个数的和为%f\n",m,sum);
        System.out.printf("%d个数的平均值是%f\n",m,sum/m);
    }
}
